Speaker
Mrs
Yulia Kazarina
(API ISU)
Description
The study of primary cosmic rays in the energy range 10^16-10^19 eV is of special interest since in this range a transition from galactic to extragalactic sources is supposed. The Tunka-133 array in the Tunka Valley (close to lake Baikal, Russia) detects air-Cherenkov emission of extensive air showers (EAS) initiated by cosmic rays in the energy range of 10^16.5 - 10^18 eV. In 2012, it was extended with Tunka Radio Extension (Tunka-Rex), which now consists of 44 antennas detecting the radio emission of EAS in the frequency range of 30-80 MHz. Three years of joint operation of Tunka-Rex and Tunka-133 have shown that a calibrated radio array can be used for independently test the scale of the cosmic-ray energy. Furthermore, by direct comparison of the reconstructed depth of the shower maximum measured by Tunka-133 and Tunka-Rex, it was shown that the precision of the radio technique for the shower maximum is at least 40 g/cm2. As next step the cross-calibration of Tunka-Rex and the recently deployed array of scintillation stations Tunka-Grande is planned, which provides the possibility of a combined measurement of the muonic and electromagnetic components of air-showers with sensitivity to the shower maximum and full duty-cycle. Exploiting the complementary muon/radio information, it should be possible to improve the mass separation in cosmic-ray spectra.
Primary author
Mrs
Yulia Kazarina
(API ISU)
Co-author
Collaboration Tunka-Rex
(Tunka-Rex)
